Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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• Item Name: LOCTITE® 277
• Manufacturer: Henkel
• Technologies: Acrylic, Dimethacrylate ester
• Color: Red
• Cure Type: Anaerobic, Secondary cure with activator
• Package Size: Contact to Techniq VN for details.
• Shelf Life: Contact to Techniq VN for details.
1. Product Overview
LOCTITE® 277 is a high-strength, anaerobic threadlocker designed for the permanent locking and sealing of large threaded fasteners (M25 and larger). It cures in the absence of air between close-fitting metal surfaces, preventing loosening and leakage caused by shock and vibration. It is a single-component, medium-viscosity, red liquid that fluoresces under UV light.
2. Applications
3. Typical Properties
Uncured Properties:
| Property | Value |
|---|---|
| Specific Gravity @ 25°C | 1.12 |
| Viscosity (Brookfield RVT, 25°C, Spindle 4, 20 rpm) | 6,000 – 8,000 mPa·s |
| Fluorescence | Positive under UV light |
Cured Properties:
| Property | Value |
| Coefficient of Thermal Expansion | 80 x 10⁻⁶ K⁻¹ |
| Coefficient of Thermal Conductivity | 0.1 W/(m·K) |
| Specific Heat | 0.3 kJ/(kg·K) |
Curing Performance:
Performance on Steel (ISO 10964):
| Property | Value |
| Breakaway Torque (M10 steel nuts/bolts) | 32 N·m (280 lb.in) |
| Prevail Torque | 32 N·m (280 lb.in) |
| Breakloose Torque (Pre-torqued to 5 N·m) | 38 N·m (340 lb.in) |
| Max. Prevail Torque | 40 N·m (350 lb.in) |
Environmental Resistance:
| Environment | Temperature | 100 h | 500 h | 1000 h |
| Motor oil (MIL-L-46152) | 125°C | 100% | 100% | 100% |
| Unleaded gasoline | 22°C | 100% | 100% | 100% |
| Brake fluid | 22°C | 100% | 100% | 100% |
| Water/glycol 50/50 | 87°C | 90% | 90% | 90% |
| Acetone | 22°C | 95% | 95% | 95% |
| Ethanol | 22°C | 95% | 95% | 95% |
| Sodium hydroxide, 10% | 40°C | 100% | 100% | 70% |
| Hydrochloric acid, 10% | 40°C | 100% | 100% | 100% |
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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